Litter bin



FIG. 1 is a perspective view of a litter bin showing a preferred embodiment of my new design;

FIG. 2 is a front side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a rear side view thereof;

FIG. 5 is a left, side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof. 

The ornamental design for a litter bin, as shown and described. 